Withholding payment for defects in the shell construction

How do I manage to make these defects "undisputed"? Do I even have a chance?

What does your expert say about it?

In my opinion, the defects are present. The defects were reported and a deadline was set for their rectification.

There are defects that a structural engineer can bless healthy, others can be remedied with a reasonable effort. But there are also defects that cannot be fixed with a reasonable effort. The principle of proportionality applies here. You wouldn't wish to dispute something like that even on your worst enemy.

Well, you ask me something .... it will be difficult to find someone who continues where the other left off because who wants to take responsibility for what someone else has messed up ... you are dependent on goodwill

The first step of the new general contractor should be to fix the botched work. He charges well for that. Why shouldn't you be able to find contractors for that?

Make a counter calculation of what the defect rectification would cost you. If the contractor does not carry out this defect rectification within the deadline, I would then deduct this amount from the installment payment. Is the installment amount covered by the service delivery?

In my opinion, a 2-week deadline is not reasonable for the elimination of these defects.

The first step of the new GU should be to eliminate the botched work. He charges well for that. Why shouldn't you be able to find contractors for that?

Of course, step. Unfortunately, I can no longer edit that.

The first step of the new GU should be to eliminate the botched work. He charges well for that. Why shouldn't you find a contractor for that?

Because in the current situation no one feels like it ... that smells like effort and trouble for the craftsman, so he would rather take on another completely new job instead, there are already 10 in line anyway and he doesn't know which one to do first

What does your expert say about it?

He says these are definitely defects. He also says he wouldn't pay the general contractor anything more and advised us to consult a lawyer. However, he also says that he does not know the market prices on the "end consumer market" well enough to give us accurate figures.

Make a counter calculation of what the defect rectification would cost you. If the contractor does not carry out this defect rectification within the deadline, I would then deduct this amount from the installment payment. Is the installment amount covered by the performance delivery?

That's currently my problem. I am not knowledgeable enough in the subject to make the calculation properly.

In my opinion, 2 weeks is not an appropriate deadline for the remediation of these defects.

Why not? That is more than the "effective" working time they needed to build the floor. What would be an appropriate deadline for the remediation?